Saturday, June 30, 2012

Researcher publishes proof-of-concept exploit for iTunes

A researcher with Zero Science Lab in Macedonia has published a proof-of-concept exploit of an iTunes flaw that allows remote code execution by an attacker.

The vulnerability is the result of a boundary error in iTunes’ processing of a playlist file. It can be exploited by an attacker to cause a heap buffer overflow when a user opens the specially crafted .m3u file, explained Gjoko Krstic in a blog post.

By exploiting the vulnerability, an attacker could execute arbitrary code on the affected node to gain control of the device, he explained.

Apple patched the vulnerability with the latest version of iTunes, 10.6.3, which it released last week. According to the security update, iTunes 10.6.3 fixes a heap buffer overflow in the handling of .m3u playlists; “importing a maliciously crafted .m3u playlist may lead to an unexpected application termination or arbitrary code execution.” Apple acknowledged the assistance of Krstic in finding and fixing this flaw.

In addition, the latest version of iTunes plugged a memory corruption issue in WebKit. If the user visited a maliciously crafted website, this could lead to an unexpected application termination or arbitrary code execution.

According to Lysa Myers with Intego, no malware has been found that exploits the iTunes vulnerability identified by Krstic. “But it’s often just a matter of time before malware writers incorporate this code into their creations to get onto computers without you knowing, much like Flashback did with its Java exploit”, Myers wrote on the Mac Security blog.
Of course, if this does develop into something, the sad thing is most Mac users would not be prepared for it.


  1. So the a proof of concept has been discovered and **already patched** by Apple before it could cause any problems.

    Isn't this a good thing? Sounds like Apple was on top of this.

  2. Apple didn't discover it, some 3rd party hacker did. If they weren't show the hole, they probably would never have found it.

  3. And if a frog had wings, it wouldn't bump it's ass a-hoppin'.

  4. Seriously though, Apple got lucky on this one. It could have been a real bad situation for Mac users.

  5. The sky could fall tomorrow too. Better take your umbrella.